Moses



(No Model.)

M. 0. BIGNALL 8zG. W. WHITMAN.

PIPE CUTTING AND THREADING. MAOHINE.

No. 309,374. Patented Dec. 16, 1884,

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lliIOSES O. BIGNALL AND GEORGE XV. \VI-IITMAN, OF ST. LOUIS, MISSOURI; SAID WHITMAN ASSIGNOR TO SAID BIGNALL.

PIPE GUTTING AND THREADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 309,374, dated December 16, 1884:.

(No model.)

To all whom it may concern:

Be it known that we, Mosns G. BIGNALL and GEORGE W. WHITMAN, both of St. Louis, Missouri, have made a new and useful Improvementin Pipe Cutting and Threading Machines, of which the following is a full, clear, and eXact description, reference being had to the annexed drawings, making part of this specification, in which Figure l is a front end elevation of the improved machine, the bed-plate being shown in section, a portion of the machine being broken away to exhibit the interior; Fig. 2, a plan of the parts shown in Fig. 1; Fig. 3, a longitudinal section on the line 3 3 of Fig. 1. the cam-ring being in the position indicated by the dotted bracket, which brings the slots 0' in line with the dies A; Fig. 4, a longitudinal section on the line 4 4 of Fig. 1, the camring being in the position last stated; Fig. 5, a detail, being a side elevation, partly in section, of the parts immediately connected with thelatch; and Fig. 6 a detail, being a top view of a portion of the die-block.

The same letters of reference denote the same parts.

This invention has relation to the means for opening and closing the dies and for removing them from the die-block. It also relates to the die-block latch and to various details of the construction.

Saving as modified by the present improvement the inachineis of the usual description. The dies A A A, 830., are held in the usual manner in the die-head B, and adapted to be adjusted radially toward and from the center of the die-head, so that the dies can be closed or opened, as desired. The means for operating the dies are as follows: The die-headis held in a cap or box constitutinga combined faceplate and cam-ring, 0, having a series of canisurfaces, 0 c, foe, against which the outer ends of the dies A A, &c., respectively abut. The combined face-plate and cam-ring, which is held to the die-head by detachable flanged ring E, is adapted to be rotated in a reciprocating manner upon the die-head. A lever, D, is pivoted at cl to a fixed part of the construction, and at d is jointed to a rod, d whiehin upon the die-head. WVhen the lever is turned up so as to draw the bracket 0 toward the pivot d, the cam-surfaces c 0. &c., recede from the dies A A, thereby enabling the dies to be opened. The dies AA, &c., are each provided with a stud, a, which, when the die isin place, engages in a slot, 0 which is formed in the face -plate portion of ring O parallel with the. cam surface 0, as shown in Figs. 1, 3, 4. By reason of this engagement the dies are separated when the combined face-plate and camring is drawn in the direction described; but when thelever D is turned down, as shown in the full lines in Fig. 1, the combined faceplate and canrring G is rotated in the opposite direction, and the camsurfaces are thereby caused to press the dies A A, &c., radially inward into the die-head. Thelever D is preferably adjusted to the bracket 0 so as to set the dies A A, &c., inward to the exact point desired by means of the nut 0", Figs. 1, 2, for which purpose the red at is suitably threaded to receive the nut c. In this manner the dies A-A, &c., can be readily and rapidly closed and expanded as desired. lVhen it is desired to withdraw the dies from the diehead, as when it is desired to change the dies for any purpose, the lever D is turned upward far enough to move the combined face plate and cam-ring to bring the openings c c opposite the dies A A, &c., respectively. These open ings 0"0 extend radially through the camring and connect, respectively, with the slots 0 c", as shown, and when the openings come into coincidence with the dies the dies dropthrough them. The opening c is of sufficient width, as seen in Fig. 3, for the stud a to pass. So far as this mode of withdrawing the dies from the die-head and cam-ring is concerned the cam surfaces may or may not be used. The ring 15, Figs. 1., 2, 3, 4, is secured to the diehead by means of the fastenings c. It holds the combined faceplate and cam-ring in place. It is also provided with a pointer, c, Fig. 1, which is used in connection with the graduation 6 on the face-plate of the cam-ring. This enables the operator to adjust the cam-ring upon the diehead readily and accurately to the desired point, and thereby close the dies properly upon the pipe I. The die-block F, consisting of the die-head B and combined face-plate and cam-ring O, is hinged at f so that it can swing open in the usual manner. WVhen closed the die -block is fastened by means of the latch G. The blockFis provided with the lug f whicl1,when the block is closed, passes between the lugs h h upon the die-blockframe H. The latch G is journalcd at g to the lugf and by turning it upon the journal, as shown in the full lines in Fig. 1, its inner end, g,is made to engage in a recess, h, in the lug ii, and as long as the latch is in this position the die-block is fastened, and to unfasten it the latch mustbe turned into the position shown in the broken lines, Fig. 1. The camring 0 is provided with the projection 0 Figs. 1 and 6, and the frame H is provided with a stop, h. The projection as the cam-ring is drawn around encounters the stop, and the farther rotation in that direction of the camring'is thereby prevented. \Vhen it is desired to turn the cam-ring around so as to bring the openings 0 0 into coincidence with the dies A A, the stop h is turned around in its bearing h" to bring it into the position as shown in the broken lines 71 The cam ring can then be turned farther around upon the die-head, as described.

lVe are aware of Letters Patent granted William Sellers, Decemberl, 1857, No. 18,7 7 5; of Letters Patent to L. \V. Stockwell, February 20, 1872, No. 123,951, and of Letters Patent to Peace and Cox, July 29, 187 3, No. 141,234, and

we lay no claim to the devices therein shown and described. 4 e claim- 1. In a pipe cutter and threader having a fixed diehead provided with radial die-slots, sliding dies arranged in the radial die-slots, and provided with lateral pins or studs for engaging cam grooves in the face-plate, the integral detachable combined faceplate and cam-ring provided with earns a on the inner face of the cam-ring, radial slots 0 therethrough, and cam-grooves c in the inner surface of the face-plate, constructed and adapted to operate substantially as specified.

2. In a pipe cutter and threader, the combination, with a die-head having radial sliding dies, of a rotating cam-ring having the bracket 0, the pivoted lever D, and the threaded rod (1, provided with nut 0 substantially as and for the purposes specified.

3. In a pipe cutter and threader, the com bination of a die-head having radial die-slots, diesarranged in the radial slots of the diehead, a cam-ring having cams 0, cam-slots c and radial slots cflwhich extend into the camslots, a projection, 0 on the cam-ring, and a swiveling stop, ha, 011 the frame which supports the die head, substantially as and for the purposes specified.

In testimony whereof we have affixed our signatures, in presence of two witnesses, this 23d day of November, 1883.

MOSES O. BIGN ALL. GEO. IV. \VHITMAN.

Witnesses:

PAUL BAKEWELL, V. H. SoUDDER, Jr. 

